JPS5884555A - Loop type data transmitter - Google Patents

Abstract

PURPOSE:To attain backup to devices, by connecting a plurality of adjacent stations with a local bys, and connecting input/output controllers and computers, etc. to be located under each station to the local bus, in a loop type data transmitter. CONSTITUTION:Adjacent stations 1011, 1012 out of a plurality of stations connected to a loop dataway 100 are provided with input/output controllers 1021, 1022 and computers 1031, 1032 correspondingly and input/output devices 1041, 1042 and 1043 are connected to input/output buses of the controllers 1021, 1022. The stations 1011, 1012 and the controllers 1021, 1022, and the computers 1031, 1032 are connected with a local bus 105 mutually. If either one station 1011 is failed out of the stations 1011, 1012, the rest station 1012 makes backup and the computer 1031 and the controller 1021 of the station 1011 transmit/receive data with the other stations via the local bus 105 and the station 1012.

Description

[Detailed Description of the Invention] The present invention connects a plurality of data transmission stages to a loop-shaped data transmission path, and connects a computer, an input/output control device, etc. to each of these data transmission stages. The present invention relates to a loop data transmission device configured to transmit and receive data between a stage and a link.

In a conventional loop data transmission device of this kind, the first
As shown in the figure, a loop-shaped data transmission line (hereinafter referred to as data way) 1 has multiple stages (87N).
Connect 2t, j, and so on, and each stage,
N2g! , . . . an input/output control device (hereinafter referred to as I10 controller) 31.

3t... or a computer connected to it, and its I10 controller 31 * 31 +... or a computer input/output cover, an input/output device required for the bus, or a terminal device 4.
The configuration was to connect 4...

However, the loop type data transmission device having such a conventional configuration has the following various drawbacks. That is, one I10 controller 3 (or computer) is connected to one station 2i, and input/output devices, terminal devices, etc. are connected to the input/output path of this I10 Conte-cho-231 (or computer). Since the configuration is such that the stage 21 is connected, if the stage 21 fails, the I controller connected to the stage 21
sFurthermore, all the equipment placed under the control of 10-931 becomes inoperable.In order to avoid such inconveniences, the stage and 2i are duplicated. is possible, but in the case of Jin, each stage, N!
”, jlx Each requires a spare stage, so the amount of 71-domain air in the transmission system increases significantly,
It also becomes very expensive in terms of cost. Also, 1
If the 10 controller 3 (or the computer) fails, all of the equipment connected to it will become inoperable.

To avoid such inconveniences, use the I10 controller! 1. j, . . . or duplication of computers is required, which complicates the system configuration and causes a significant increase in cost.

As described above, the conventional connection configuration has caused various inconveniences in terms of reliability and economy. The stage,
The purpose is to perform the paddle (of the engine, its stage, and the equipment connected to the engine).

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a professional diagram showing the configuration of an embodiment of the present invention. In FIG. There are 52 adjacent stages of a plurality of stages connected to each other. 102 is the stage, an input/output control device (hereinafter referred to as controller) provided corresponding to the stage 101H, and 10J1 is a computer. 102 Snow is the above-mentioned stage, I10 controller installed corresponding to N101m, 108. is a calculator. 1041 is the above I10 controller 102!
The input/output device (hereinafter referred to as l10-) connected to the input/output port of
(referred to as A), 104 snow, 104. is the input/output device (
Hereinafter, the input/output device of 104 Yuki Ye10-m, 5o4s will be referred to as l10-C). 105 are the two stages mentioned above, and 1011 . 101. and these stages, I corresponding to Nj 071 * J 6 J@
10 Controller 1021.102 Snow, and Calculator J
031e J 018 is a local/gus that connects each other, 10f, 1 (#@ is this local path 10
5 is a terminator installed at the start and end of the signal to prevent signal reflection.

Cocoa, upper ffi local oars 108, station 10ha*tOt*e110 puntrolla j021e10
Since it is used for data transfer between 1gm and computers 1011, 103, etc., high reliability is achieved. In this case, the local path 10s is composed only of cables (for example, coaxial cables or twisted pair wires). Also, the stage to be connected, 7105.
10-1g.

110 controller 102%, 102g, calculator 1
03g, 103. The connection configuration is such that failures such as the above do not affect the local path 105. Connector 1 at this time
A specific example of the configuration of the first part is shown in FIG. In FIG. 3, 200 is the local path 105 and the station 101 to which it is connected, xox* x10 controller 10J1 e102 snow r computer 10J11e 10
These are insulated transmitting and receiving end circuits that are separately interposed between the 3s and the like. The transmitting/receiving ends ml & z o o are insulated type output terminals 201D, 201 on the drive side and the receive side for transmitting and receiving data (serial data) while maintaining electrical insulation with the q-Calpus 105.
Tt.

A driver for sending data onto the local path 105 via the Noils transformer 2DI'D on the drive side! A circuit 202, a receive circuit 203 for inputting data on the local path 10B via the transformer 2'1liR' of the register flIII, and a receive circuit 203 for forcibly stopping data transmission onto the local path 105. switch 204 for disconnection. It is also configured with a resistance element R for impedance matching.

The operation of one embodiment will now be described. 6 During normal operation, a 110 controller 21 ozB is placed under a stage 1011.101°.

102, and calculator 1031.108. etc., when transmitting and receiving data between other stages, computers, Ilo controllers, etc., the I10 controller 10
11, and the computer 1031 are placed under the transmission control target of the stage 1 unit 1011, and the 110 controller 102. ,
The computer 103m and the computer 103m are placed under the transmission control of the stage 101m, and data is transmitted between them and the other stages. That is, I10 controller 10
2K and the computer 1031 selectively use the local path 105 to access data with the stage 1011, and the I10 controller 1028 and the computer 103 selectively use the local path 105 as described above The stages are used to access data between the stage and the stage 1011, and the data is transmitted and received between the stage and the computers or controllers 110 and the like via the data way 100, respectively. Also, the computer 10S1 calculates x/e −A
roal, and when the computer 1033 transfers data between Ilo -B ro4! , or 110-C
104s, the local path 1011 is used as the transfer path. On this occasion,! 10 controller 1021゜102m and computers 1031 and 103g both use the same local path 105.
Computer 1 is connected to the top with the same configuration.
031 transfers data to Ilo-B 1o4. Or ■10-
CJ o4. The computer 101 can transfer data between rows 1 and 5, and the computer 101 can transfer data to and from the above I10-B J 04!
, Ilo-C1o4s in exactly the same manner as the data transfer between Ilo-C1o4s. It is possible to transfer data at the junction. That is, computers 1031 and 10
3! shares each input/output device (terminal device) 1 connected to the I10 controller j02B+ and 1023.

In this way, the local path 105 is
Ha, 101. and other stages, during data transmission between the I10 controller 1021
．． 102. , and computer 1031.10B, and are selectively used during r-to-mail transfer between them, extremely high reliability is required. Therefore, as shown in FIG. 3, the local path 106 includes stages 1011, 101, . Starting with money! 10 controller 1021.102 snow, computer zosl *1o3m *t Insulated transmitting/receiving circuit 200. . . , and each transmitting/receiving end circuit 200 . ... is provided with a switch 204 that prohibits data transmission onto the transmission path only when the devices connected thereto become abnormal. This ensures that the local path xOs itself does not fail, and that even if one of the devices connected to the local path 106 fails, the failure does not spread to other devices. pass 106
t- can be obtained.

Here, the stages connected to the local path 105, nodes 1011.101. If one of them, for example, stage 10, breaks down, it will be replaced by the remaining stage, stage 10. That is, stage 10 and station 1010, which are connected by the same local path 105, have a mutual backup function, and if station 1011 fails, stage 1011 backs it up, and station If the stage 101 fails, the stage 1011 will back it up. Therefore, for example, if the stage 10 fails, the I10 controller 1
021 or the total NIa 103x is the local path 105
Connected to 9th stage, 10th stage, 101th stage. Other stages other than Calculator or! When sending and receiving data between the Ilo controller 1021 and the Ilo controller 1021,
, or the computer 1031 selectively uses the mechanical path 105 to access data to and from the stage 101, and communicates with other stages, computers, or the stage 101, etc. via the data way 100t'. Send and receive data between

Also, I10 controller 102%, 102%, and computers 1031 and 103 are all using the same local path 10.
．． Each of the transmitting and receiving end circuits 200. ..., so even if one of them, for example, the calculation 'a103x, fails, it will remain connected to the computer 103, and! /θ"Controller J 021 t J 02 There is no mutual influence between the wealth, and the computer ros, which is in operation, x10 controller 10:1K.

102 It is possible to disconnect the failed computer 101 from the system without affecting t1 due to snow, etc., that is, the computer 101 can be disconnected from the local path 106.
K can replace the processing performed by the computer 101.

In this way, between the two stages, a local path 108f consisting only of cables is created.
Installed in the data way and wired each stage, 1011.101. be placed under! 10 controller 101. ,101m and computer 1os1.103m
% to the above local path 105 using an insulated transmission/reception unit, 1i
ii+road 200. . . , the stages 1011, 101, and 101.
Furthermore, it is possible to perform easy and effective packing and downloading without having to multiplex the computers 1031 and 103 placed under the computers 1031 and 103 to be used as computers 1031 and 103, which are placed under the computers 1031 and 103. It can be distributed without affecting the whole system, and furthermore, a failed device can be easily disconnected without affecting other systems. Also, the local path 105 has two adjacent paths.
Stage 1011.101. It is wired between the cables and serves as reinforcement for the data way 100, and is composed only of cables, with a physical length of several tens to hundreds of meters, and connectable transmitting/receiving end circuits. Since the number of 200 pieces is several to several, it can be easily realized at low cost.

As described in detail above, according to the loop data transmission device of the present invention, a plurality of adjacent stages are connected by a local path, and one of the above-mentioned stages is connected to the local path.
By introducing a configuration in which devices such as input/output control equipment and computers placed under the stage are connected, there is no need to multiplex the devices connected to the stage and ten stages. The stage and the equipment placed under the stage can be easily and inexpensively packed.

[Brief explanation of drawings]

Fig. 1 shows a conventional connection configuration for a loop data transmission device; Fig. 2 shows an embodiment of the present invention;
, Figure 3 shows l! in the above embodiment. FIG. 3 is a circuit diagram specifically showing an example of a connection configuration of the parts. 100...Data transmission path (data way), 1011
．． 1011... stage, n, 1021.7031.
...I/O control device (i10 controller), 103
1.101 snow...calculator% 10416104*
e104g-...I/O device (110-A~i10-
C) 106...Local path, 106. ．． 106m・
...4 turnator, 200...transmitting/receiving end circuit (insulated type). Applicant's representative Patent attorney Takehiko Suzue Figure 1, 1: 1υ41

Claims (1)

[Claims] In a data transmission system that transmits and receives data between arbitrary stages via a loop data transmission path, a plurality of stays 71 are connected to local paths different from the loop data transmission path, and this local A loop data transmission device characterized by connecting at least one computer and a plurality of input/output devices to a path.